Selector for automatic phonographs



Dec. 16, 1952 H G, JENSEN 2,622,144

SELECTOR FOR AUTOMATICPHONOGRAPHS Filed Nov. 15, 1949 s Sheets-Sheet 1 IA c 0 E F e 69 12 92 4% -1 3 4 5 6 7 I 91 T4 mvgwron Jmzazz. G $228622,

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ATTORNEY Dec. 16, 1952 H, JENSEN 2,622,144

SELECTOR FOR AUTOMATIC PHONOGRAiHS Filed Nov. 15, 1949 3 Sheets-Sheet 2N l/E/V TOR 5291x2422 G fizzs'ezz ATTORNEY Dec. 16, 1952 H. cs. JENSEN2,622,144

SELECTOR FOR AUTOMATIC PHONOGRAPHS Filed Nov. 15, 1949 s Sheets-Sheet s.95 H6. 7 v H6. 9

I 'N VEIV TOR Z ez'mzz 6: jezzsezL A TTORNEY Patented Dec. 16, 1952SELECTOR FOR AUTOMATIC PHONOGRAPHS Herman G. Jensen, Chicago, Ill.,assig'nor to J. P.

Seeburg Corporation, Chicago, 11]., a. corporation of IllinoisApplication November 15, 1949, Serial No. 127,459

6 Claims.

This invention relates to selectors for automatic phonographs andparticularly to an impulse creating mechanism adapted to create twoseries of impulses, each of selected number to effect selection of acorresponding recording.

In my co-pending application Serial No. 561,984, filed November 4, 1944(Patent No. 2,489,782, issued November 29, 1949), I have described andclaimed such a mechanism employing two sets of buttons of equal number.Each set controls the number of impulses in each train. The embodimentdescribed in said patent provided buttons in each set and thus provided100 double train signals having effective impulses from 1-1 to 10-10.

The principal object of the invention is to provide a similar mechanismemploying two sets of buttons of equal number and capable oftransmitting two-train signals numbering the square of that number, butproviding a wider range of numbers for the impulses of one train and asmaller number of impulses for the other train. In the specificembodiment hereinafter described, I employ two sets of 10 buttons and Ican transmit 100 double train signals with effective impulses from 1-1to 20-5. It may here be noted that it is known in this art to provideone or more extra or dead impulses in one or more trains. In the patentreferred to, two such extra pulses were provided in each train and inthe embodiment of the invention hereinafter described, one extra pulseis provided for the first train only. The term efiective number ofimpulses used above, disregards these extra impulses.

According to the present invention, the buttons are employed to cut adefinite number of impulses out of each train. Thus, one set of buttonsis arranged progressively to cut one more impulse from the larger train.Each button of each pair of the other set of buttons progressively 'cutsone more impulse out of the smaller train and one button of each of suchpairs also effectively cuts 10 pulses out of the larger train. Theimpulses are created by an arm which passes over two sets of contacts.Normally, the arm and all the contacts are connected in the impulsercircuit. The buttons are associated with switches which cut a definitenumber of pulses of each train out of the impulser circuit. The last 11contacts of the large set of contacts are subtended by a large contactwhich is normally disconnected from the impulser circuit. One button ofeach of said pairs of buttons has the effect of connecting the largecontact to the impulser circuit. When this large contact is thusconnected,

one large pulse is transmitted instead of 11 short pulses. In this way,I am able to transmit trains of 1-1 to 20-5 eifective impulses. Since,as noted above, one dead impulse is added to the first train, the actualnumber of impulses transmitted, ranges from 2-1 to 21-5, 100 in all.

The embodiment of the invention hereinafter described is suitable foruse when one of the impulse responsive devices described and claimed inco-pending application Serial No. 127,458, filed November 15, 1949, byAlbinus G. Bodoh and with one of the embodiments of an inventiondescribed and claimed by me in co-pending application Serial No.117,389, filed September 23, 1949, which discloses a selector employingtwo sets of circuits numbering 20 and 5, respectively.

The invention will more fully be described from the followingdescription of a preferred embodiment thereof, taken in conjunction withthe accompanying drawings, in which:

Figure 1 is a front elevation, partly broken away, of a wallboxembodying my invention;

Fig. 2 is a fragmentary sectional detail taken on the line 2-2 of Fig.1;

Fig. 3 is a side elevation, as viewed from the left in Fig. 1, of themotor and associated elements;

Fig. 4 is an inverted sectional. View taken on the line 4-4 of Fig. 1showing the buttons and associated parts;

Fig. 5 is a similar view showing one of the buttons latched in;

Fig. 6 is still a similar view showing one of the buttons locked in;

Fig. 7 is a fragmentary sectional elevation taken on the line '|'l ofFig. 1 showing a button'and associated elements;

Fig. 8 is a wiring diagram; and.

Fig. 9 is a fragmentary diagram showing a modification thereof.

. Referring to the drawings, the wallbox is shown as a whole in Fig. 1.It comprises a housing [0 which includes a program display unit H whichmay suitably be that described and claimed in co-pending applicationSerial No. 625,784, filed October 31, 1945, by Mahlon W. Kenney, nowPatent No. 2,545,362, issued March 13, 1951; The housing ID has anopening which permits two rows of buttons 12 to be actuated by the user.A receptacle i3 is provided for admission of coins, which are separatedaccording to denomination, and pass through a slug rejector l4 The boxis intended for reception of nickels, dimes and quarters. An acceptednickel momentarily closes a switch It. An accepted dime momentarilycloses a switch l6 and an accepted quarter momentarily closes a switchIT. The closing of one of these switches effects the storage of thecorresponding credit on a credit array It. This array carries at leastsix snap switches i9, since the present device is intended to providesix plays for a quarter, two for a dime and one for a nickel. Normally,these switches are open and are located in alignment with the armaturesof three solenoids 20, 2| and 22. When a nickel closes the switch [5,the solenoid is energized, closing the adjacent switch It to conditionthe box for one selecting, operation. When a dime closes the switch I6,the solenoid 2| is energized and the adjacent switch i9 is closed tocondition the box for two selecting operations. When a quarter closesthe switch ll, the solenoid 22 is energized and the adjacent switch It!is closed to condition the box for six selecting operations. It is to benoted that during each selecting operation, the array I8 is rotated oneswitch spacing in the counterclockwise direction as viewed in Fig. 8. Astationary cam member 23 is located so as to open any closed switchpassing it and in order to provide the appropriate number of operations,the cam member is located so as to open the switch closed by a nickelnear the end of the first selecting operation. This credit mechanism isdescribed and claimed in co-pending application Serial No. 736,446,filed March 22, 1947, by Henry M. Merrill and is further described indetail in co-pending application Serial No. 117,389, filed September 23,1949, by Herman G. Jensen. It is therefore considered sufiicient to addthat when there is credit on the array 18, the line 24 is grounded andthis line is ungrounded towards the end of the last selection for whichcredit has been established. Three lines 25, 23 and 27 are connected tothe wallbox. 21 is a ground line. 23 supplies power, suitably 26 voltsA. C., and is the impulser line. It may here be noted that an impulse iscreated by the box each time the line 25 is grounded. One series ofbuttons I2 carries letters A, B, C J, K. It may be noted that the letterI is omitted to avoid confusion with the number 1. The other series ofbuttons l2 carries the numbers 1 to 10. This enables 100 selections tobe made by actuating one letter button and one number button, such asA1, B4, K9, etc. The numbers buttons carry switch poles 28 which arenormally connected in series. The pole 28 of button It] is connected tothe first of a first series of contacts 29, mounted on a disc 30. Thepole of switch 23 carried by button 9 is connected to the second contactand so forth. There are 21 contacts in the series 23 and the line 25 isconnected to the pole of switch 28 of button No. i and to the last 12contacts of the set 29.

The letters buttons are also individually associated with switch poles3! which are also normally connected in series. A second set of contacts32 is provided on the disc 33 being spaced from the first set by a largespace which may suitably be about three normal contact spacings. Theline 25 is connected to the first contact 32 and also to the pole of theswitch 3| carried by button A. The pole of switch 3| associated withbutton 0 is connected to the second contact 32. The pole of the switch3| associated with the button E is connected to the third contact 32.The pole of the switch 3| associated with the button G is connected tothe fourth contact 32 and the pole 3! associated with the button J isconnected to the fifth contact 32.

The disc also carries a long contact 33 which subtends the last 11 ofthe contacts 29. When the button A is actuated, its pole 3| engages acontact 34 and when the button C is actuated, its pole 3| engages acontact 35. The contacts 34 and 35 are connected directly to the largecontact 33. When buttons E and G are actuated, their poles 3| engagecontacts 33 and 37 which are connected to a switch pole 33 whichnormally engages a switch pole 39 connected directly to the largecontact 33 and a switch pole to which is connected to a contact lilwhich is engaged by the pole 3! carried by the button J when that buttonis actuated.

During a selecting operation, a grounded arm 22 passes over the contacts29, 32 and 33. It may here be remarked that while the arm 22 is passingover the contacts 29 and 33, the three switch poles 38, 39 and 40 are incontact, but when the arm is passing over the contacts 32, the threepoles 33, 39 and 40 are separated. The purpose of this separation in themanner in which it is accomplished, will hereinafter be described. Aswill also be hereinafter described, the arm 42 is put into a completerevolution when a button of each set is actuated. Which buttons of eachset are actuated, determine the number of impulses in each of the twotrains. The impulser circuit normally includes all the contacts 29, andall the contacts 32. If button It and button K are actuated, all thecontacts 23 and 32 remain in the impulser circuit so that twoconsecutive trains of 21 and 5 impulses are created. If button 9 isactuated, one contact 29 is eliminated from the impulser circuit and soforth, button No. l eliminating 9 impulses. Thus, if the large contact33 is not connected to the impulser circuit, actuation of the numbersbuttons gives the first train between 12 and 21 impulses. When the largecontact 33 is connected in the impulser circuit, a single large pulse issubstituted for the final 11 pulses which can be provided by the last 11contacts 29. Thus, the inclusion of the large contact 33 in the impulsercircuit provides the first train. with a range of impulses from 2 to 11.It will thus be seen that the number of impulses in the first set can becontrolled by the buttons to give 2 to 21 impulses. When any of thebuttons A, C, E, G or J is actuated, the large contact 33 is connectedto the impulser line 25.

Actuation of the button J or K cuts no contacts 32 of the second seriesout of the impulser circuit. Button G or H cuts the last contact 32 outof the impulser circuit. Button E or F cuts the last two contacts 32 outof the impulser circuit. Button C or D cuts the last three contacts 32out of the impulser circuit and button A or B cuts the last fourcontacts 32 out of the impulser circuit. It will thus be seen that byactuating any one of the 10 numbers buttons and any one of the 10letters buttons, a two train series of impulses from 2-1 to 21-5 may betransmitted, signals in all. Thus, if buttons A and I are actuated, fourof the contacts 32 are eliminated from the impulser circuit, the first 9contacts 29 are eliminated and the last 11 of the contacts 29 areeffectually replaced by the large contact 33 so that a train of twoimpulses and a train of one impulse are transmitted, the last impulse ofthe first train being a long impulse. If buttons B and l are actuated,four of the contacts 32 are eliminated from the impulser circuit and thelarge contact 33 is not connected to the impulser circuit. Actuation ofthe button I eliminates the first three contacts of the series 29 fromthe impulser circuit so that a double train of 18 and 1 impulses aretransmitted. If buttons G and 9 are actuated, the large contact 33 isconnected in the impulser circuit,'one of the contacts 32 is eliminatedfrom the impulser circuit and one of the contacts 29 is eliminated fromthe impulser circuit. Consequently, a double train of and 4 impulses istransmitted, the last impulse of the 10 being a long impulse.

It may here be noted that the first train has a minimum of two impulsesfor the purposes of the electromagnetic devices which are actuated bythe trains at the phonograph instrument. It also may be noted that thepurposes of the switch poles 38, 39 and 40 which are separated when thearm 42 is passing over the contacts 32, is to prevent a user fromcreating more than one train of impulses with the contacts 32 byactuating simultaneously a plurality of letters buttons. When a numbersbutton is actuated, it breaks the series connection between the poles23, and. actuation of another button of higher number can have noadditional effect. The same is true with the letters buttons when thepoles 38, 33 and 40 are separated, but if it were not for thisseparation, the common connection of the contacts 35, 33, 31 and 4|could be utilized to include 2 or 3 trains derived from the contacts 32.But with the provision of the three poles 33, 39 and 40, it isimpossible .to attain any effect from the contacts 32 except byeliminating the last 1, 2, 3 or 4 of the contacts 32.

This same result may be obtained in other manners. Thus, as shown inFig. 9, I may provide on the buttons A, C, E, G and J, additionalmovable poles 43 to connect the impulser line 25 to the large contact 33when any of these letter buttons are actuated.

The power line 26 is connected to a step-down transformer 44 whichsupplies voltage to lamps 45 to illuminate the box. The power line 23 isconnected to one terminal of the actuating motor 46, to the switches l5,l6 and I7 and through a resistor 41 and signal lamp 48 to the line 24.Consequently, when one of the switches I9 is closed, the lamp 48 lightsto indicate that there is credit on the machine and that selections canbe made. The line 24 is connected also to one side of a switch 49 whichis closed when any letters button is in actuated position and to anormally closed switch 50, the other side of which is connected to theother terminal of the motor 46. This other terminal of the motor 43 isalso connected to a normally open switch 5|, the other side of which isgrounded to a segment 52 on the disc 39 and to one side of a switch 53which is closed when any numbers button is in actuated condition. Theother sides of the switches 49 and 53 are connected together to form aseries circuit. The large contact 33 and the contact 52 are arranged tobe engaged by a contact54 on the arm 42. The contact 52 has effectiveportions sub-tending the first few contacts 29 and the last few contacts32 and is provided between these portions with a cut-out 55 in which thecontact 54 is located in the normal zero position of the arm 42.

The switch 50 is normally closed. When credit is established on themachine by closing one of the switches 9, the motor circuit is completedfrom the power line 26 through the closed. switch 50 which is connectedto the line 24 grounded by the closing of the switch l9. Consequently,the motor goes into operation for a very brief time whereupon the commonpole of the switches 50 and 5| is moved to open position and the motorstops. The resultant movement of the arm 42 is so slight that itscontact 54 does not engage the fixed contact 52. This slight operationof the motor actuates latching locking means associated with the buttonsinto latching position as will hereinafter be described so that the twobuttons for a desired selection can be actuated and the buttons held in.When one button of each series is actuated, the two switches 53 and 49are closed, completing the circuit from the power line 26, motor 46,switch 53, switch 49, line 24 and closed credit switch l9 to ground.Thus, the motor is put into operation and in a manner hereinafterdescribed, the switch 5| is closed, the actuated buttons are locked in,and the motor drives the arm 42 through a complete revolution creatingthe impulses in the line 2 5 determined by the buttons actuated. Theswitch I9 may open during a complete revolution of the arm 42, but sincethe switch 5| provides an independent circuit for the motor, the openingof the switch l9 does not terminate the operation of the motor. At theend of the complete revolution of the arm 42, the switch 5| opens, theswitch 53 closes and the buttons are unlatched so that they resume theirnormal positions.

The contact 52 which is in parallel when the switch 5| rendersunnecessary precision in the closing and opening of the switch 5 I. Thisswitch may be arranged to open at any time near the end of a completerevolution when the contact 54 is moved into engagement with the contact52. The motor is de-energized when the contact 54 moves into the cut-out55, at which time the switch 50 is closed.

The motor 43 and disc 30 are rigidly carried by a frame 56 which ismounted on the base of the wallbox. This frame also carries thesolenoids 2!}, 2i and 22 and provides a mounting for the shaft 5'? whichcarries the arm 42 and a shaft 53 which provides a bearing for theswitch array H3. The motor 48 is operatively connected to the shaft 5?by speed reduction gearing 53 so that the arm 42 is driven at a suitablylow speed to create the trains of impulses. The train of gearingincludes a small pinion 63 freely mounted on the motor shaft.Complementary clutch elements 5| are provided on the pinion 33 and onthe outer end of the motor shaft. They are normally moved out ofengagement by a'spring 32. The motor is so arranged that when it isenergized, its rotor is magnetically sucked in to the right as viewed inFig. 1, bringing the clutch elements 6| into engagement to effect thedrive. When the motor circuit is broken, the sprin 32 separates theclutch elements 6| so that the momentum of the motor rotor is notcommunicated to the shaft 5?. The shaft 51 carries a pinion 53 whichmeshes with a gear rigidly connected to the switch array l8. The pinion63 and gear 34 havera 1 to 6 ratio so that the array'moves one switchspacing for each revolution of the shaft 5? which carries the impulsecreating arm 42. The shaft 5'! rigidly carries a cam 65 which engagesthe pointed end 56 of a lever 61 which is pivotally mounted at 68 on theframe 53. The lower end of the lever 31 engages a bail 69 which isassociated with the push buttons in a manner which will hereinafter bedescribed. This bail is pivotally mounted at 73. The upper end of thelever 6T carries a bracket H which engages a piece of insulation l2carried by the common pole of the switches 50 and 5| Normally the point63 of the lever, 31 is located on the highest point ofthe cam 65 asshown in Fig. 3. In this position, the lever holds minating the drive ofthe motor so that the point 635. remains-seated on the step '39-". Thismovement of thelever: 61' moves bail 59 into button latching position.The relation of the locking bars to the buttons, in; this condition isshown in Fig. abutton of each series is actuated, the switches 53' and59 are closed and the motor circult is completed through these switchesand through the closed switch [9 so that the motor goes. into operationto create theim-ptdses and: the cam. 55 being driven in thecounterclockwise direction as viewed in 3, the point '55 of the lei/ch57dro 33 or? step :5 allowing the switch 5| to close. This movement of thelever 9''? again displaces the bail 59 so that the actuated buttons areheld in actuated position as shown in Fig. 6.

The first movement of the cam 65 as a result of establishing credit onthe machine is not sun cient to bring the arm 42 into engagement withthe'contact 52. The second movement of the cam 55- does brin the arm 42into engagement with the contact 52 and this may occur slightly beforethe closing of the switch 5i.

After the arm 92 has ridden over the contacts 32, the lever 61 is swungin the counterclockwise direction by the cam 65 opening the switch 51and closing the switch 59. The engagement of the arm 42 with the contact52 insures complete operation of the motor until after the switch 50 isclosed and after the lever 61 has moved the bail 69 back to free buttonposition (Fig. 4) allowing the actuated buttons to move outwardly.

.After these results have been accomplished, the

arm 42 has moved into the cut-out 55 and the machine is in normalcondition. It is to be noted, however, that in the event that creditremains on the machine, the motor 46 continues tooperate until the point66 of the lever 61 rests on the step 13 of the cam 65, and in this casethe operation of the motor is terminated by the resulting opening of theswitch 59. This leaves the buttons in condition to be latched as shownin Fig. 5. The switch pole 39 is biassed away from the switch pole 49,but the switch pole 39 is biased towards the switch poles 39 and 99 witha stronger force so that the three poles are normally in engagement.These poles are suitably mounted on the motor 46 and the pole 39 isadapted to be moved away from the poles 39 and 40 by means of a piece ofinsulation 14 (Fig. 2) which is carried by a lever 15. The lever 15 ispivotally mounted at 16 on the disc and is held in position by means ofa headed pin 11 carried by the disc 30. The pin 11 extends through aslot 18 in the lever 75. The lever 15 is provided with a generallycircular opening 19 through which extends a pin 99 rotatable with theshaft 51. This pin may suitably be mounted on a gear 8| which forms partof the gearing 59, the gear 8| being the last gear of the train andbeing rigidly mounted on the shaft 51. The lever 15 is provided with acam formation 82 which projects into the opening I9. During the rotationof the shaft 51, which occurs in the counterclockwise direction asviewed in Fig. 2, a pin 89- engages the cam 82 and actuates the lever 15upwardly as viewed in Fig. 2 so that the pole 39 is elevated away fromthe pole 39 and this pole, as a result of its normal bias, moves clearof the pole 49. The pin 89 and the cam 82 are arranged to maintain theseparation of these poles for the angular movement of the arm 42 overthe contacts 92. As has been previously indicated, the separation ofthese poles prevents a user from deriving more than one train from thecontacts 32. It is to be noted that inthe modification shown in Fig. 9,the poles 98, 99 and 9 and the lever '15 are unnecessary.

Each button I 2 is mounted on a bar 83, as best seen in Figs. 4-. to 7.The bars are slidably mounted in a frame 84 and each bar is pushedoutwardly by a spring 85. On the frame 84 is mounted a strip ofinsulation 86 and each bar 83 carries a strip of insulation 81. Thestrips of insulation 86 and B! carry the contacts to perform theswitching operations previously described. Each bar 83 is provided witha large opening 88 and a small opening 89. A locking bar-99 extendsthrough the large openings 89 of each set of buttons. The bars 90 areslidably mounted in the frame 94. Each bar is provided at one endwith awasher 9|v and a coil spring 92 bears against this washer and against aframe 84- so that each bar 99 is biased to the right as viewed in Figs.4, 5 and 6. This causes the ends of the bars 90 tobear against. contacts93 on the intermediate web of the bail 69. Adjacent each bar 83 the bar90 is provided with a cut-out 94 which provides an undercut camformation 95 for each bar 89. The large openings 89 of the bars 83 arein the unactuated position of the buttons, in register with the overallwidth of the bar 90. The normal condition of the bar 99 is shown in Fig.4. Inv this position the point 66 of the lever 51 is in engagement. withthe high part of the cam (Fig. 3) and the bail 69 has been swung so asto force the bar to the left as viewed in Fig. 4 with the camprojections 95 clear of the bars 33. Thus, it will be seen that if abutton I2 is actuated, its spring 95 will push it outwardly when thefinger is removed from the button. When credit is established on themachine, the point 66 of the lever 61 rests on the step 13 of the cam 65and in this condition the bail 69 is moved away from the bars a slightdistance. The bars 99 follow the bail 69 under the influence of theirsprings 92 so that the bars 99 are now moved into the position shown inFig. 5. This brings the cam projections into the large openings 88. If abutton is now actuated, its bar 83 engages the cam projection 95, forcesthe bar a 99 slightly to the left as viewed in Fig. 5 and permits thecam projection 95 to enter the small opening 89 of the actuated bar,thus holding the actuated button in actuated condition. When a button ofeach set is actuated, the motor 46 goes into operation to create the twotrains of impulses and the step 13 of the cam 65 moves clear of thepoint 66 of the lever 61 so that the bars move still further to theright into the position shown in Fig. 6. It is to be noted that thismovement brings the major part of the bar into the opening 88- of eachunactuated button so that every actuated button is locked in and everyunactuated button is locked out, while the two trains of impulses arebeing created.

As best seen in Fig. '7, the reduced end of each bar 83 of each setprojects beyond its frame 39 and normally engages a strip 99 which ispivotally mounted at 91 at each end of the frame 84. At a suitableposition, the strip 96 carries a piece of insulation 98 which engages aswitch contact. In Fig. 7 I have shown a letters button and the switch49 is arranged to cooperate with a piece of insulation 98. It will thusbe seen that when a letters button is pressed, the strip at is swung incounterclockwise direction as viewed in Fig. 7 and the switch 49 isclosed. Similar means are associated with the numbers buttons to effectthe closing of the switch 53 when a numbers button is in actuatedposition.

Although the invention has been described in connection with thespecific details of a preferred embodiment thereof, it must beunderstood that such details are not intended to be limitative of theinvention except insofar as set forth in the accompanying claims.

Having thus described my invention, I declare that what I claim is:

l. A selector for automatic phonographs comprising two sets of contacts,an arm arranged to pass over said contacts, an impulser circuit normallyincluding said contacts and said arm, a

. set of'manually actuable members arranged to cut an individual numberof one set of contacts outof said circuit, a second set of manuallyactuable members arranged to cut an individual number of the other setof contacts out of said circuit, a large contact subtending a definitenumber of the first set of contacts also arranged to be engaged by saidarm, and means associated with certain manually actuable means of thesecond set for connecting and disconnecting said large contact to andfrom said circuit.

2. A selector for automatic phonographs comprising a large and a smallset of contacts, an arm arranged to pass over said contacts, an impulsercircuit normally including said contacts and said arm, a set of manuallyactuable members each arranged to cut an individual number of the largeset of contacts out of said circuit, a second set of actuable membersincluding a plurality of pairs of members, either of each pair beingarranged to cut an individual number of the smaller set of contacts outof said circuit, a large contact subtending a number of the large set ofcontacts and arranged to be engaged by said arm, and means associatedwith one of each said pair of members for connecting said large contactto the impulser circuit.

3. A selector for automatic phonographs comprising two spaced sets ofcontacts, an arm arranged to pass over said contacts, an impulsercircuit normally including said contacts and said arm, a set of manuallyoperable switches each arranged to cut out an individual number ofcontacts out of one set out of the impulser circuit, a second set ofmanually operable switches including a plurality of pairs of switches,either of each pair being arranged to cut out an individual number ofthe other set of contacts out of the impulser circuit, said switchesbeing arranged to cut out one or more contacts from the ends of saidsets of contacts remote from the space between said sets of contacts, alarge contact subtending a plurality of the contacts of the firstmentioned set of contacts adjacent said space and arranged to be engagedby said arm, and means associated with one of each pair of switches forconnecting said large contact to the impulser circuit.

4. A selector for automatic phonographs comprising two sets of contactsarranged with a space between them, one of said sets being large and theother small, an arm arranged to pass over said contacts, an impulserline connected to a plurality of the large set and at least one of theother small set of contacts adjacent said space, a set of switchesnormally connected in series at one end to said impulser line, andindividually to the contacts of the large set remote from said spacewhereby on actuation of one of said switches an individual number ofsuch contacts is disconnected from said impulser line, a second set ofswitches normally connected in series, and at one end to said impulserline, alternate one of said second switches being connected to thecontacts of the small set remote from said space whereby on actuation ofone of said second set of switches an individual number of lastmentioned contacts is disconnected from said impulser line, saidimpulser line and such contacts as are not disconnected and said armconstituting an impulser circuit, a large contact subtending a pluralityof the large set of contacts adjacent said space and arranged to beengaged by said arm, and switch means associated with alternate ones ofsaid second set of switches to connect said large contact to theimpulser circuit.

5. In an impulser, in combination, a series of contacts, a conductorconnected thereto, a movable contact arranged to pass over said contactsto create impulses, said conductor, contacts and movable contact beingarranged in an impulser circuit, means for disconnecting one or morecontacts from said conductor, a large contact subtending a plurality ofsaid contacts and arranged to be engaged by said movable contact, andswitch means arranged to connect and disconnect said large contact toand from said conductor.

6. In an impulser, in combination, a series of contacts, a conductorconnected thereto, a movable contact arranged to pass over said contactsto create impulses, said conductor, contacts and movable contact beingarranged in an impulser circuit, a large contact subtending a pluralityof said contacts and arranged to be engaged by said movable contact, andswitch means arranged to connect and disconnect said large contact toand from said conductors.

HERMAN G. JENSEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,809,020 Burdick June 9, 19312,140,138 Miller Dec. 13, 19

